Survivorship after reverse total shoulder arthroplasty and predictors of 1-year and overall mortality.

Abstract

Patient survivorship and risk factors of mortality after reverse total shoulder arthroplasty (RTSA) are seldom and inadequately studied. The purpose of this study was to evaluate the mortality rates and predictors of 1-year and overall mortality after RTSA. We retrospectively reviewed 1518 consecutive adult patients who underwent RTSA at our institution. The Social Security Death Index and institutional electronic medical records were queried to verify patient living status. Patients were censored at date of death if deceased, the date that living status was verified if alive, or latest follow-up if living status could not be verified. Mortality rates and risk factors of 1-year and overall mortality after RTSA were identified on univariate and multivariate analysis. Mean follow-up was 5.1±3.8 years. Thirty-day (0.1%), 90-day (0.7%), and 1-year (1.8%) mortality rates were low but increased to 11% at 5 years. Increased odds of 1-year mortality were independently associated with heart disease (odds ratio [OR] 2.64, 95% confidence interval [CI] 1.07-6.50, P=.035) and use of a cemented stem (OR 2.64, 95% CI 1.04-6.69, P=.041). Independent risk factors of overall mortality included older age at surgery (hazard ratio [HR] 1.05, 95% CI 1.03-1.07, P<.001), minority ethnicity (protective risk factor, HR 0.37, 95% CI 0.15-0.91, P=.031), heart disease (HR 1.42, 95% CI 1.00-2.02, P=.048), diabetes mellitus (HR 1.47, 95% CI 1.04-2.08, P=.028), tobacco use (HR 1.79, 95% CI 1.08-2.98, P=.025), post renal transplant (HR 12.69, 95% CI 3.92-41.05, P<.001), chronic liver failure (HR 4.40, 95% CI 1.38-14.09, P=.013), and receiving a cemented stem (HR 1.60, 95% CI 1.13-2.26, P=.008). RTSA carries a low risk of short-term mortality postoperatively. When counseling patients preoperatively, surgeons should consider the predictors of mortality after RTSA reported herein to ensure appropriate patient selection and counseling.